I spent a couple of hours at a specialty shop last night, auditioning three bows with my NXT: An entry-level $350 Cadenza composite, a Brazilwood Eastman in the same price range, and a $500 Richter (also Brazilwood) made in Germany.
The experience was compromised by the fact that he had assumed I would bring my own rosin, and only had violin rosin on hand. Still, it was an instructive experience.
He was able to draw a good sound out of all three bows, even though he's a violinist and not used to Bass, amplified or not. I struggled to avoid getting the octave harmonic instead of the fundamental, and kept drawing a weird, harsh upper resonance on the G string.
The biggest difference in tone didn't come from switching bows. It arose after he showed me how to improve my grip, and I grew more consistent. In other words, my lack of technique dwarfed the differences between the three bows.
Still, we both agreed on some consistent patterns:
The cheap Brazilwood bow was easier to control, but the more expensive German one produced a more focused tone and offered more dynamic range.
The Cadenza was the easiest to control, and the lighter weight was noticeable. However, it produced a colder, less complex signal. It didn''t pull as big and resonant tone out of the A and E strings.
Even though it didn't sound as fat as the others, I was consistently able to pull a weird rattle out of the G string with the Cadenza. The sound originated up towards the nut. I don't know if it's a loose winding on the 9 year old string, or interference from the fingerboard (he commented that I need to increase the neck relief).
Regardless, both wooden bows produced a fuller, more harmonically rich tone than the Cadenza, without exciting the rattle on the G string.
Fiddling with EQ helped to close the gap somewhat, but in the end it couldn't inject the missing harmonic content that the Cadence lacked.
I didn't make a purchase last night. Still, the tone of the German bow was good enough to make me lean towards that quality level, even though I found it harder to play consistently. From a learning perspective, I think it would make more sense to grow into the better bow, instead of settling for the cheap and easy options.